Publications

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effect of two insect growth regulators on the camel tick, hyalomma dromedarii (acari: ixodoidea: ixodidae). 19863701801
ticks (acari: ixodidae) infesting the arabian camel (camelus dromedarius) in the sinai, egypt with a note on the acaricidal efficacy of ivermectin.in this study, tick burdens on camels (camelus dromedarius) were determined in the vicinity of the st. catherine monastery, sinai, egypt. in total 2,545 ticks (1,491 adults and 1,054 nymphs) were collected and identified. mean tick burdens were relatively heavy and the range in number of ticks per camel was very broad (6-173). hyalomma dromedarii was the predominant tick species and accounted for 95.6% of the adult ticks. other ticks found were h. marginatum subspp. and h. anatolicum excavatum. ...19937628237
cholesteryl esters on the body surfaces of the camel tick, hyalomma dromedarii (koch, 1844) and the brown dog tick, rhipicephalus sanguineus (latreille, 1806).cholesteryl esters were found to constitute a major component of the lipids coating the body cuticle of females of the camel tick, hyalomma dromedarii and the brown dog tick, rhipicephalus sanguineus. one or more cholesteryl esters, alone or in combination, have been shown to serve as the mounting sex pheromone of several species of ixodid ticks. consequently, knowledge of these compounds is important for an understanding of the mating behavior of these ticks. based on thin layer chromatography, ...19947628247
camel tick (acari:ixodidae) control with pour-on application of flumethrin.the pyrethroid flumethrin (bayticol) was tested in camels (camelus dromedarius) as a pour-on for the control of the camel tick, hyalomma dromedarii. two, small, naturally infested camel herds, one heavily infested and the other lightly infested, each composed of eight head of animals, were used for this field trial. in each herd, four camels were randomly selected for treatment and the other four untreated camels were kept as controls. the heavily infested herd was treated with 2 ml 10kg-1 body ...19969017876
traffic of the tick embryo basic protein during embryogenesis of the camel tick hyalomma dromedarii (acari: ixodidae).the tick embryo basic protein (tebp) is present in the nucleus as a counterpart of histones at early embryonic stages of the tick hyalomma dromedarii. the sharp drop in the tebp nuclear level and elimination of the n-terminal dipeptide (leucine-serine) between days 12 and 15 after oviposition suggested the transport of tebp to the cytoplasm for protein turnover. the traffic of tebp during tick embryogenesis was examined. the level of tebp was detected in the cytoplasm from the different embryoni ...199810095826
species of ticks on camels and their seasonal population dynamics in eastern ethiopia.a study was conducted to identify the species of ticks found on camels (camelus dromedarius) and their seasonal population dynamics in eastern ethiopia. collection and identification of the ticks were undertaken at 2-month intervals from december 1997 to august 1999. on each occasion, all the visible adult ticks were collected from one side of the body of each of the same 17 camels. the most abundant species of ticks on the camels were rhipiephalus pulchellus (85.2%), hyalomma dromedarii (5.9%), ...200415080539
hyaluronidase isoforms from developing embryos of the camel tick hyalomma dromedarii.changes in hyaluronidase activity in the camel tick hyalomma dromedarii were followed throughout embryogenesis. peak activity of the enzyme on days 21 and 24 during development was accompanied with a complete organization of larvae before hatching on day 27. during purification of hyaluronidase to homogeneity, ion exchange chromatography lead to four forms (haase1, 2, 3 and 4). haase2 and haase4 with highest purity and specific activities after chromatography on sephacryl s-200. the apparent mol ...200516051510
drop-off rhythms and survival periods of hyalomma dromedarii (acari: ixodidae) fed on camels (camelus dromedarius) in the sudan.flat larvae and adult hyalomma dromedarii (acari: ixodidae) were fed on camels' ears. feeding periods and drop-off rhythms of engorged females and nymphs together with engorgement weights of females were recorded. newly hatched larvae and newly moulted adults were released in nylon mesh bags at the base of a tree. their survival periods were seasonally monitored. h. dromedarii behaved exclusively as two-host ticks under field conditions. larval-nymphal feeding periods ranged between 16 and 27 da ...201020347226
ticks (acari: ixodidae) infesting camels (camelus dromedarius) in northern sudan.monthly total body tick collections from 13-20 camels were conducted for 2 consecutive years (2000-2001) in northern sudan. tick populations were correlated with locality, season, predeliction site, sex and coat colour. hyalomma dromedarii was found to be the predominant (89%) tick species infesting the camels. other tick species found in very low numbers were hyalomma impeltatum (7.7%), hyalomma anatolicum anatolicum (3.3%), hyalomma truncatum (0.29%), hyalomma marginatum rufipes (0.25%), rhipi ...200920698438
life cycle of the camel tick hyalomma dromedarii (acari: ixodidae) under field conditions in northern sudan.engorged hyalomma dromedarii females were placed for development in shade and sun (open non-shaded site) in april, august and december for two successive years. engorged nymphs were also placed at the same sites in january, march, may, june, july and august. preoviposition periods ranged between 9.8 and 11.7 days in the shade but longer in the sun in december (14.7 days). egg production index was higher in august (0.72) than in april and december (0.46 and 0.39, respectively) in shade and in aug ...201020850935
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